Sealing composition for vehicle-tires.



Patented; Apr.13,1909.

d w Z m f a NZ 4 wmiw h? #06 Wa on ATTORNEYS W. W. MOCORD, G. F. CLARK d: P. M. HALL.

SEALING COMPOSITION FOR VEHICLE TIREQ.

APPLICATION FILED DEO.15. 1908.

UNITED STATES PATENT oFEIoE.

WILLIAM W. MGCORD, GEORGE F. CLARK, AND PRESLEY M. HALL, OF SEATTLE, WASHINGTON.

Specification of Letters Patent.

Patented April 13, 1909.

Application filed December 16, 1908. Serial No. 467,881.

To all whom it may concern:

Be it knownfthat we, WILLIAM W. Mc- Conn, GEORGE F. CLARK, and PRESLEY M. HALL, citizens of the United States, and residents of Seattle, in the county of King and State of Washington, have invented anew and Improved Sealing Com osition for Vehicle-Tires, of which the fo owing is a full, clear, and exact description.

This invention .relates to certain im rovements in pneumatic" vehicle tires," an more particular y to a fluid or plastic substance, so arranged in the tire that in case of a unoture, said-substance will immediately the aperture and prevent the escape of air. The pneumatic tire is formed of a plurality of ayers and intermediate two of these layers there is inserted our improved com osition which has such a consistency that t e inner and outer layers of the wall normally retain the same relationship to each other, but in case of a puncture through the walls, the plastic material will fill the aperture. The ayer of plastic material. referably does not extend entirel around t e tire but extends only from one ase flange around to the other and is of greatest thickness midway between these two flanges, that is, at the tread of the tire.

Reference is to be had to the accompanying drawing, forming a part of this specification, in which the figure shows a transverse section through a tire constructed in accordance with our invention.

The body of the tire may be made in any well-known manner, but preferably includes an inner layer 10,- of rubber impervious to air and which serves to receive the latter under pressure. On the outside of this inner tube or inner layer there is disposed a layer of our improve composition 11-, which is of an adhesive character and of a semi-liquid or lastic consisteniy. The composition is. glu

pre erably formed 0 e, molasses, cotton, tar, vinegar and pure rubber gum. The layer of our improved composition is of variable thickness, the greatest thickness being at the tread of the tire. The composition is held in place between the inner tube 10 and a second rubber tube 12, which may be formed integral with the-inner tube 10 a ong the inner periphery of the tire and between the base flanges. Encirclin the tube 12 is a layer of strong fiber 13, or instance, cotton, and this la er is connected to the base flanges 14,- which hitter may engage with the flan es of a clencher rim 15. On the outside of this fiber layer, there is preferably provided a thickened tread 16 of rubber, which may, if desired, include a series of strips 17, of cotton or other strong fiber.

As will be noted, the com osition is adjacent the innermost tube or ayer of the tire, so that any small cuts or abrasions in. the outer casing will not affect the composition. In case'the entire wall ofthe tube IS'PUIIO- tured, the air escaping from the inner tube 10 will'force a portion of the composition into the aperture in the tube 12 and'close the opening in the'latter, so that no more air can escape. The composition will then enter the 0 ening in the inner tube 10 and eflectively c ose the opening therein. As the tube 12 is normally im ervious to the passage of air, the inner tn 0 10 may contain any number of o enings without impairing the efficiency of t e tire. In fact, the inner tube 10 may serve merely to retain the com osition adja cent the inner surface of the tube 12, so that ithe in osition to enter and close any openings in't e latter.

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

A composition for use in closin apertures in vehicle tires, including glue, mo a. cotton, tar, vinegar and gumrubber.

In testimony whereof we have signed our names to. this specification in the presence of .twosubscribing witnesses.

WILLIAM W. MOCORD. GEORGE F. CLARK. PRESLEY M. HALL. Witnesses:

L. FRANK BBO N, W. M. Enron.- 

